Get Out
After Chris escapes his “girlfriend’s” house, laying next to the dead bodies in the street, he hears police sirens. Luckily, it turns out to be his buddy Rod. Originally though, the police sirens were actual police and Chris ends up in prison since all of the evidence burned down with the house. Director Jordan Peele ended up changing it though, as we were able to play out that entire ending in our heads the moment we saw the police sirens.
Watch the alternate ending HERE.